Radial drilling-machine



(No Model.)

W. H. WARREN. RADIAL DRILLING MACHINE.

No. 453,780 Patented June 9.1891.

Unite TATES .ATENT OFFICE;

lVIlzLIAM ll. WARREN, OF \VORCESTER, MASSACHUSETTS.

RADIAL oRiLuNe iviAoi-nNE.

SPE'EJIFICATION forming part of Letters Patent No. 453,780, dated June 9, 1891. Application filed January 29, 1891. Serial No. 379,503. (No model.)

To all whom it may czuwcrn: guides c, as desired, by the powerscrew (For Be it known that l, iVlLLl'A-M I'l. \VARREN, otherwise. a citizen of the United States, residing at D indicates the radial arm carrying the Worcester, in the county of W'orcester and head ordrill mechanism E, with the drill Fitate oi Massachusetts, have invented a new spindle c and feed devices, all. suitably and useful liadial i')rilling-illaehine, of which mounted and adjustable to any desired posithe following, together with the accompanytion. Power and motion are transmitted to hug drawings, is a specification sufficiently the drill from the pulleys F by means of the full, clear,and exact to enable persons skilled system of shafts and gearing arranged in the 10 in the art to which this invention appertains usual well-known mannen.

to make and use the same. lhe drill-head mechanism and means for Theobjeetofmyprcscntinventionisto proeffecting operation and adjustment of the ride in a radialdrillirig-machine an eflicient dpi'lling-tool, being all well known and not whereby the pivoting-post that supfeatures of my present invention, are not sq ports the radial arm and drillingmechanism illustrated in detail, and need not be herein carried thereon is braced and sustained more fully described against displacement by lateral pressure on I indicates a swing-brace circular arm or the radial arm while affording facility of ad segment, one end of which is rigidlyattached justmcnt to the various positionsend withto the side of the pivot-post, or to an earno out'intertering with the adjustment of the piece or boss J, formed therein in such manradial arm to all positions within the range of ner that/the rim or circle of-the brace is conits-various movements. eentric with'the pivoting-axis off the post 0. To thislcnd my invention consists in pro- Said swing-brace passes around or through vioiing, iii connection with the pivot-post, a the standard-column, and is disposed in con- 25 circular supporter or swing-brace that ope itjunction with lugs or projections K fixed ates in conjunction with the fastening de- (hereon; Itis made of sutiieient length to vices combineihwiih the standard-column], accommodate the pivotal movement or swing whereby said brace can be 1ocked,.clnmped, of the radial drill-supporting arm I) from its r retained at any position required for givforemost to its rearmost limit of adjustment. yo ing rigid support against'rotative movement The brace is preferably made in annular of the pivot-post and horizontal swing of the form, with a horizontal rim and an upward radial arm and drilling mechanismcarried flange, as indicated, and is provided with a h p series of holes or l'eccsscsil for engagement In the drawings, l igi ire '1 is a side View of with a locking-dog or pin n. The lugs orpro- 35 such portions of a radial lilllilJg-IllEiChlll? as jeelions K, fixed on the column A, embrace "will illustrate the natiire of nny invent on. the circular brace, and a clamp device 771/ or Fig. 2 isy a horizontal sectional view of the scrcwm is arrangedthereon for lirmly clampsame; and Fig. 3 is a ack View of-a portion ing the rim, as indicated, or in other equivaof the standard-columu, circular' brace, and lent manner. for securely retaining or hold- 4o fastening devices. f said swing-brace at anylposition of ad- Beferring to partsfi denotes the standardustment. In one lug or pro ection K, fixed column lined in upright position upon the on the standard-column, is arranged a lockfloor-table ii and standing about nine feet ing dog or pin 71, that engages any one of the (more or lessl in height. holes or recesses i in the brace-circle for posi- 5 r C denotes the upright pivot-post, havingtively holding the same at in'lervals of adits upper and lower ends pivotally supported ustmcnt corresponding with the spacing of in hearings o and ct, fixed on the standardthe several recesses.

column, and fitted on its front side with ver- In former practice it has been customary tical guideways c, whereon the head-plate or to hold the ad usted position of the radial mo 50 slided of the radial arm D is adjustably fitted arm D by tightening the pivot-bcarings a a in a manner to be shifted up or down on said by means of their caps or clamp-screws s, s

to give friction on the pivots ot the post but when using the drill in horizontal position the strain and pressure tending to swing the arm are so great that it is very dithcult to attain sutticicnt friction at the pivotbearings to sustain/the strain; but with my improvement the curved brace I acts to give the desired degree of rigidity to the pivotpost and to sustain the radial arm against lateral pressure in a very firm and substantial manner. in the present instance I have shown the circular brace as attached to the central part ot the pivot-post; but, if preferred, it might be disposed at the upper end of said post, or at the lower end of the same, or at such position as may be deemed preferable in any particular instance; also, if in any instance preferred, instead of passing the circular brace through an opening in the standard column, it can be made to pass around or adjacent to the outer surface of the column, the lugs K and clamping devices being located upon the column more or less near the outer or inner side thereof to accentmodate the position of the brace. This would simply involve a Variation in the diameter of the circle on which the brace is formed with.- out material change in st rueture or operation.

I claim as my invention herein to be secured by Letters Patent- 1. In a radial drilling-machine, the combination, with the stamlard'eolumn, the upright rotatable pivot-post: provided with the vertical guideways, and the radial arm carrying the drilling mechanism mounted thereon, of a swing-brace segment attached to the up right pivot post and arranged to swing through a recess in said standard col man, a nd, a locking device in connec tion with the standard-col man that engages said swing-braee seg ment for retaining'the parts at positions of adjustment and sustaining said radial arm against lateral pressure, substantially as set forth.

2. The combination, with the standard-co1- man, the upright pivot-post mounted in bearings upon said column, and the radial arm carrying the drillingmechanism supported thereon, of the curved brace having one end rigidly attached to said pivot-post, its arm disposed in conjunction with lugs fixed on said standard-coinmn, and the LldlttpSLt'LW or binding device connected therewith for clamping said brace in connection to said column, substantially as and for the purpose set forth.

3. The combination of the standard-column A, the pivot-post C, mounted in bearings on said standard-column, the semicircular brace I, rigidly attached at one end to said. pivotpost and provided with a perforated or recessed flange that passes through or between projecting lugs K on said s'tantlard-column, and the adjustmentlock or pin 71, that engages said recessed flange, substantially as and for the purpose described.

\Vitness my hand this 26th day of January, A. D. 1891.

\VILLIAM ll. \VARREN.

Witnesses:

OHAs. 11'. Romance, EDWARD Wurst-1r. 

